Comment on "Flow-distributed oscillations: Stationary chemical waves in a reacting flow"

In a recent paper by Kern and Menzinger [Phys. Rev. E 60, R3471 (1999)] a s uccessful verification of the stationary space-periodic structures predicte d by Andresen et al. [Phys. Rev. E 60, 297 (1999)] was reported. Kaern and Menzinger suggest a mechanism for the formation of such structures that yie lds a linear relationship between the selected wavelength and the flow rate . We find this mechanism too simple and produce numerical simulations that support the original interpretation of these structures.